1-3 of 3 Answers
Time and date always displays, will need to use back light at night. Not sure about syncing, I don't use it for that.
Sorry, there was a problem. Please try again later.The M400 will display the time continuously as well as sync it's information with the MyFitnessPal service both on iOS and Android devices. - Mike@PolarUSA
Sorry, there was a problem. Please try again later.Yes it shows constant time display. It will sync with MyFitnessPal.
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